CO2 and RH/T Sensor Module

For HVAC and Air Quality Applications

CMOSens® Technology for IR detection enables highly accurate carbon dioxide measurement at a competitive price. Along with NDIR measurement technology for CO2 detection, a best-in-class Sensirion humidity and temperature sensor is also integrated on the same sensor module. Ambient humidity and temperature can be outputted by Sensirion's algorithm expertise through modelling and compensation of external heat sources without the requirement of any additional components.

Product Highlight

Liquid Flow Sensor for Biomedical Applications

The single-use liquid flow sensor LD20 enables fast, precise and reliable measurement of the lowest flow rates. The new flow sensor series is based on a successful design study that was first presented in 2014 and has already received several international awards. Product development of the LD20-2600B, the first representative of the new single-use sensor series, is now complete and it is ready for high-volume production. The intelligent, compact and cost-effective sensor is suitable for a wide range of biomedical applications in the field of critical and home care.

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Experts for Smart Sensor Solutions

Sensirion's sensors are used in a wide range of markets and different applications. Our high-quality environmental and flow sensors and sensor solutions improve energy efficiency and sustainability. They increase our safety, support our health and raise the quality of life.

Sensirion – The Sensor Company

Sensirion Worldwide

Founded in 1998 Sensirion has become the leading manufacturer of flow and environmental sensors solutions. The company now employs people in various countries such as the USA, South Korea, Japan, China, Taiwan, and Germany. The headquarters in Switzerland is responsible for research, development, and production.

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Downloads and Instructions for Your Liquid Flow Meter Kit

Thank you for being interested in our liquid flow meter solutions! Below you will find all necessary documents as well as useful information regarding the evaluation of your liquid flow meter. In case of further questions please contact our technical customer support team under www.sensirion.com/contact.

Your Liquid Flow Meter Kit or Evaluation Kit contains:

Liquid Flow Meter Kit for SLI, SLS, SLG, or SLQ Series:

The Liquid Flow Meter of your choice

A basic set of fluidic connectors for the selected sensor type

SCC1-USB Sensor Cable from the sensor to a USB port

SCC1-Analog Sensor Cable (marked with red sleeve)

Quick Start Guide for Liquid Flow Meter Kits

Exemplary SLx Liquid Flow Meter

LPG10 planar glass sensor in acrylic block

Pre-assembled LPG10 Evaluation Kit

LD20 liquid flow sensor with base station

Evaluation Kit for the LPG10 Series:

One pre-assembled manifold body including the selected type of sensor and a connector cap with a 4-pin molex connector

Plug and Play with Sensirion's Liquid Flow Meter

Useful Information

General Information:

The sensor relies on a thermal measurement principle. Therefore it is sensitive to the thermodynamic properties of the fluid. For details see "CMOSens® for Liquid Flow Meters".

Sensirion Liquid Flow Meters are 100% factory calibrated, typically for H2O and/or IPA. However, your Liquid Flow Meter can be used to measure other fluids as well by choosing the calibration field most closely matching your fluid. Contact Sensirion if you want to use much different fluids in terms of thermal properties.

Please see your data sheet for the specific pin-out of your sensor type.

There are additional operating guidelines and application notes available which will be send to you on request (e.g. on I2C, installation guidelines, ...).

When choosing the COM Port Settings to start the Sensirion Viewer Software select a COM port so that “USB Serial Port” appears next to your COM port setting. It is a PC dependent setting and no general one.

Handling Instructions:

The maximum flow ranges of the sensor are specified such to achieve a laminar flow at the position of the micro thermal chip. Use tubing and fluidic connection material with at least the same inner diameter as the one of the capillary.

Start testing the sensor horizontally mounted. This is the orientation it has been calibrated in.

Cleaning Instructions:

After ending your measurements, make sure to always store the sensor's flow channel clean and dry in order to maintain a high level of performance. This avoids the growth of a biofilm or other deposits which will impact the sensor's reading the next time. To do so, always drain the fluid, flush with cleaning agent (deionized water first, then acetone, and finally IPA) and blow out with air or allow to air dry. Do not use acetone for cleaning the sensors of the LD20 series. Its wetted materials are not compatible with acetone.

In case you encounter a drifting behavior of the sensor, it might be due to deposits inside the capillary. Flush the sensor with acetone or IPA (maybe several times) or try storing it overnight with the sensor's flow channel filled with acetone. You can even run bleach to remove very sticky biofilms. Never mechanically clean the sensor's fluidic channel.